django DetailView无法从ManyToMany字段中获取数据。

Question

我有3个模型：第一个主要的 "石头 "通过ForeignKey与 "Typs "和Many-to-Many与 "Mentions "连接.当我试图用DetailView类为每个 "石头 "写一个详细视图模板时，它只显示 "石头 "和 "Typs "的数据，而不是 "Mentions "的数据。

我的models.py (必要部分)

class StonesManager(models.Manager):
def all_with_prefetch_mentions(self):
    qs = self.get_queryset()
    return qs.prefetch_related('mentions')


class Stones(models.Model):
title = models.CharField(max_length=30, verbose_name='Назва')
place = models.TextField(verbose_name='Месцазнаходжанне')
legend = models.TextField(null=True, blank=True, verbose_name='Легенда')
typ = models.ForeignKey('Typ', null=True, on_delete=models.PROTECT, verbose_name='Тып')
objects = StonesManager()

class Typ(models.Model):
name = models.CharField(max_length=20, db_index=True, verbose_name='Назва тыпу')
def __str__(self):
    return self.name

class StonesImage(models.Model):
image = models.ImageField(upload_to=stones_directory_path_with_uuid)
uploaded = models.DateTimeField(auto_now_add=True)
stones = models.ForeignKey('Stones', on_delete=models.CASCADE)
user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)

class Mentions(models.Model):
work = models.TextField(verbose_name='Праца')
year = models.PositiveIntegerField(blank=True, null=True)
sacral_objects = models.ManyToManyField(Stones, related_name='mentions', verbose_name='Сакральны аб\'ект')

我的views.py(必要部分)

class StonesDetail(generic.DetailView):
queryset = Stones.objects.all_with_prefetch_mentions()
template_name = 'volumbf/stone_detail.html'

def get_context_data(self, **kwargs):
    context = super().get_context_data(**kwargs)
    context['image_form'] = self.stones_image_form()
    return context

def stones_image_form(self):
    if self.request.user.is_authenticated:
        return StonesImageForm()
    return None

我的模板(必要部分)1. 全部以正确的方式显示

<h2> {{ stones.title}} </h2>
<p>{{ stones.legend }} </p>
<p>{{ stones.place }}</p>
<p>Typ: <a href="/volumbf/{{ stones.typ.pk }}/">{{ stones.typ.name }}</a></p>

2. 完全没有显示

提到。

{% for work in stones.mentions.work %}
        <p><a href="{% url 'work_detail' work.pk %}"> {{ stones.mentions.work }}</a></p>
{% endfor %}


 {% for i in object.stonesimage_set.all %}
        <li class="list-inline-item" >
            <img scr="{{ i.image.url }}">
        </li>
 {% endfor %}

{% if image_form %}
    <div>
        <h2 >Upload New Image</h2>
    <form method="post"
          enctype="multipart/form-data"
          action="{% url 'StonesImageUpload' stones_id=object_id %}" >
        {% csrf_token %}
        {{ image_form.as_p }}
        <p ><button class="btn btn-primary"></button> </p>
    </form>
    </div>
{% endif %}

我想 "石头 提到工作 "这个名字不对 但我不确定 拜托，我在这里做我的第一步，需要任何帮助。

Answer 1

我说的没错，错误出在模板上，请看下面的内容

{% for work in stones.mentions.all %}
    <p><a href="{% url 'work_detail' work.pk %}"> {{ work }}</a></p>
{% endfor %}

{% for i in object.stonesimage_set.all %}
        <li class="list-inline-item" >
            <img src="{{ i.image.url }}" alt="{{ i.id }}" >
        </li>
{% endfor %}

action="{% url 'StonesImageUpload' stones.pk %}"